Rear bumper for an automobile



FIG. 1 is a perspective view of a rear bumper for an automobile showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a right-side view thereof.

No part of the rear surface is being claimed. However, any portion of the rear surface that happens to be visible in the front perspective view has inner portions that are shown in broken lines, and such broken lines are not part of the claimed design.

The broken lines shown in FIG. 1 are for illustrative purpose only and form no part of the claimed design. 

The ornamental design for a rear bumper for an automobile, as shown and described. 